Cooling Fluid Pressure Control for RF Skin Burn Prevention

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Solution Overview

Problem

Conventional skin care devices using high-frequency waves to treat skin issues face the issue of excessive skin temperature increase leading to thermal burns during the application process.

Innovation Solution

A cooling system for skin care devices that includes a storage container, chamber, discharge valve, fluid level sensor, and pressurizer to manage and transfer a cooling fluid effectively, preventing thermal injury by maintaining and increasing internal pressures to ensure complete fluid transfer and delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high frequency waves are applied to treat skin issues, then skin treatment effectiveness is improved, but skin temperature increases excessively causing thermal burns

Engineering Contradiction:

Improveskin treatment effectivenessVSAvoidthermal burns

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful thermal effect into a beneficial cooling mechanism by using a phase change material that absorbs excess heat from the skin through phase transition (melting), thereby preventing thermal burns while maintaining treatment effectiveness. The harmful thermal energy is transformed into a useful cooling effect.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces a cooling fluid as an intermediary substance between the RF electrode and the skin. This cooling fluid absorbs and transfers heat away from the treatment area, mediating the thermal interaction and preventing direct thermal damage to the skin while allowing the RF treatment to proceed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If cooling fluid is transferred from storage container to chamber, then cooling effectiveness is improved, but incomplete fluid transfer occurs due to pressure difference

Engineering Contradiction:

Improvecooling effectivenessVSAvoidcooling fluid transfer completeness

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent changes the pressure parameter of the storage container by using a pressurizer to increase the internal pressure. This pressure parameter change overcomes the pressure difference that prevented complete fluid transfer, ensuring all cooling fluid is moved from the storage container to the chamber for maximum cooling effectiveness.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies preliminary action by using the pressurizer to increase storage container pressure before fluid transfer begins. This preliminary pressure increase ensures that the fluid transfer process completes fully without interruption, preventing the incomplete transfer problem.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If cooling fluid level is monitored continuously, then fluid management precision is improved, but system complexity increases

Engineering Contradiction:

Improvefluid level monitoring accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements self-service by using a simple fluid level sensor that automatically detects when the cooling fluid level reaches a predetermined position. The system self-regulates the transfer process based on this automatic detection, eliminating the need for complex continuous monitoring systems while maintaining adequate fluid management precision.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system provides pain relief and skin soothing while preventing thermal injury by ensuring all cooling fluid is transferred and maintaining consistent pressure, thereby reducing the risk of burns.

Implementation Method 1

a pressurizer configured to increase an internal pressure of the storage container such that the internal pressure of the storage container becomes greater than an internal pressure of the chamber

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

transferring a cooling fluid to a target area of the skin to which high frequency wave is applied... prevent thermal injury to the skin

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20260020979A1Cooling system for skin care device

Publication Date: 2026.01.22 JEISYS MEDICAL INC

AI summary

A cooling system for a skin care device includes: a storage container storing a cooling fluid; a chamber in which the cooling fluid transferred from the storage container is filled; a discharge valve for discharging or blocking the cooling fluid filled in the chamber; a fluid level sensor for measuring a level of the cooling fluid filled in the chamber; and a pressurizer for increasing an internal pressure of the storage container so that an internal pressure of the storage container becomes greater than an internal pressure of the chamber, based on a value of a fluid level measured by the fluid level sensor being maintained constantly for a preset period.